Display how many messages are queue

- update the docker-composer to add Redis
- add migrations

src/Wallabag/CoreBundle/Resources/views/themes/material/layout.html.twig

@@ -19,6 +19,8 @@
             Materialize.toast('{{ flashMessage|trans }}', 4000);
         </script>
     {% endfor %}
+
+    {{ render(controller("WallabagImportBundle:Import:checkQueue")) }}
 {% endblock %}
 
 {% block menu %}

src/Wallabag/ImportBundle/Controller/ImportController.php

@@ -16,4 +16,58 @@ class ImportController extends Controller
             'imports' => $this->get('wallabag_import.chain')->getAll(),
         ]);
     }
+
+    /**
+     * Display how many messages are queue (both in Redis and RabbitMQ).
+     */
+    public function checkQueueAction()
+    {
+        $nbRedisMessages = null;
+        $nbRabbitMessages = null;
+
+        if ($this->get('craue_config')->get('import_with_rabbitmq')) {
+            $nbRabbitMessages = $this->getTotalMessageInRabbitQueue('pocket')
+                + $this->getTotalMessageInRabbitQueue('readability')
+                + $this->getTotalMessageInRabbitQueue('wallabag_v1')
+                + $this->getTotalMessageInRabbitQueue('wallabag_v2')
+            ;
+        } elseif ($this->get('craue_config')->get('import_with_redis')) {
+            $redis = $this->get('wallabag_core.redis.client');
+
+            $nbRedisMessages = $redis->llen('wallabag.import.pocket')
+                + $redis->llen('wallabag.import.readability')
+                + $redis->llen('wallabag.import.wallabag_v1')
+                + $redis->llen('wallabag.import.wallabag_v2')
+            ;
+        }
+
+        return $this->render('WallabagImportBundle:Import:check_queue.html.twig', [
+            'nbRedisMessages' => $nbRedisMessages,
+            'nbRabbitMessages' => $nbRabbitMessages,
+        ]);
+    }
+
+    /**
+     * Count message in RabbitMQ queue.
+     * It get one message without acking it (so it'll stay in the queue)
+     * which will include the total of *other* messages in the queue.
+     * Adding one to that messages will result in the full total message.
+     *
+     * @param string $importService The import service related: pocket, readability, wallabag_v1 or wallabag_v2
+     *
+     * @return int
+     */
+    private function getTotalMessageInRabbitQueue($importService)
+    {
+        $message = $this
+            ->get('old_sound_rabbit_mq.import_'.$importService.'_consumer')
+            ->getChannel()
+            ->basic_get('wallabag.import.'.$importService);
+
+        if (null === $message) {
+            return 0;
+        }
+
+        return $message->delivery_info['message_count'] + 1;
+    }
 }

src/Wallabag/ImportBundle/Resources/views/Import/check_queue.html.twig

@@ -0,0 +1,11 @@
+{% if nbRedisMessages > 0 %}
+    <script>
+        Materialize.toast('Messages in queue: {{ nbRedisMessages }}', 4000);
+    </script>
+{% endif %}
+
+{% if nbRabbitMessages > 0 %}
+    <script>
+        Materialize.toast('Messages in queue: {{ nbRabbitMessages }}', 4000);
+    </script>
+{% endif %}